MrSiggler has released a public alpha release of his MegamanX: Odyssey game. In this alpha, you are able to maneuver around a large test level created by MrSiggler to see if everything works. There are two playable characters in this game, MegamanX and Zero. There are plain files and a selfbooting DiscJuggler image available on the site located here.MrSiggler says there is a secert passage in the level, if your elite enough to find it, then go ahead.
Update: MrSiggler has a new url leading to his web-site, it is http://mrsiggler.cjb.net. Also 10 screenshots were just put up, so go check it out.